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04 Mar 2015 7:43:11am

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"all the materials used to construct them including rare earth minerals." Virtually all electrical generation (excluding solar) is made by spinning magnets inside wire loops. Power stations heat water to make steam that turns steam turbines which spins magnets in wire. Coal, gas, nuclear, hydroelectric, it doesnt matter. They all use magnets, and thus all use rare earth minerals. “think of all the tonnes and tonnes of concrete ” well think about how much concrete is used to build a coal power station. And then think about how much concrete is needed to build a coal mine. And then think about digging up coal, sorting it, washing it, milling it, drying it, transporting it, burning it, disposing of the waste products, and somewhere in there making electricity. Build a wind turbine, and it makes electricity. And yes, not all the time. But renewable energy solutions rely on a mix of technologies that are connected by a national power grid. Wind farms here and over there, solar panels all around, a hydroelectric dam or two and hey presto, everybody wins.